//
//  ZGTabbar.swift
//  0110-weibo
//
//  Created by 鲍志刚 on 16/1/10.
//  Copyright © 2016年 zhongye. All rights reserved.
//

import UIKit

class ZGTabbar: UITabBar {

    //手写代码  会调用这个构造函数 自定义的入口
    override init(frame: CGRect) {
        super.init(frame: frame)

        addSubview(plusBtn)
//        print(plusBtn)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
//        print(subviews)
        let w = self.bounds.width / 5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        
        var index:CGFloat = 0
        
        for subview in subviews {
        
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!) {
            
//            print(subview)
            
            subview.frame = CGRectOffset(rect, index * w, 0)
            
                index += (index == 1 ? 2:1 )
            
            }
        }
        
        plusBtn.frame = CGRectOffset(rect, 2 * w, 0)
    }
    
    
    //懒加载一个按钮
    
    lazy var plusBtn: UIButton = UIButton(imageName: "tabbar_compose_icon_add", backImageName: "tabbar_compose_button")
    
    
    
//    {
//       let btn = UIButton()
//        
//        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: .Normal)
//        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: .Highlighted)
//        
//        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: .Normal)
//        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: .Highlighted)
//        
//        btn.sizeToFit()
//        
//        return btn
//        
//    }()

}
